Regular Expressions 101

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"
(?m)^abc
"
g
(?m)
match the remainder of the pattern with the following effective flags: gm
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
^ asserts position at start of a line
abc
matches the characters abc literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.

Regular Expression
No Match

r"
"
g

Test String

Code Generator

Generated Code

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Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report.
For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/